This will depend if she is at her peak of lactation, when the calf is drinking the most milk, therefore she is producing more. In this case she can be still producing milk for 3 or even 5 months after that. However, if the calf is nearing weaning age (about 10 months), than the cow might be producing milk for about 2 months. This will change from cow to cow depending on how well they produce milk, heavy milkers will produce longer than light milkers.
A calf that has just been weaned from its mother. It's a calf that no longer relies on its mothers milk for food and growth, but is now dependent on hay, silage, grain, water and mineral for its source of food.
Just like humans, cows only produce milk to feed their young. When the calf is old enough to eat grass, the mother cow stops producing milk. The way we get milk is to repeatedly impregnate the mother cow, take the baby calf away to be slaughtered for veal, and then take the milk that was meant for her calf. It is literally like taking candy from a baby.
This is called "weaning." When a rhino cow gives birth to her new calf, she doesn't want her older calf around to take away the milk that her new calf is in more need of than her older calf, and the older calf may hurt its new sibling out of spite. So the rhino cow has to drive the older calf away and start getting him/her to learn to live on their own.
Provided this is a dairy cow you are referring to, and the calf has been taken away and fed milk replacer, the optimum length of time a cow can be "artificially stimulated" to produce milk is 10 months.
It depends. Is she a beef cow or dairy cow? Are you wanting to keep the cow with the calf or separating the calf from the cow? Usually with beef cows you don't bother with milking them unless you have to because the calf isn't up and suckling soon after birth and you want to encourage the calf to be up and suckling, or to get some milk from a cow or heifer that won't accept her calf right away to feed that calf with. With dairy cows, though, if you've separated the calf from the cow right away, it's ideal to milk that cow to collect the colostrum to feed that calf--and other calves--to the benefit of the calf's health. But, if you are wanting to keep the calf with the cow for a couple of days, then no, it's not necessary.
Try to find out why not. Is the mother's bag tender and she's kicking the calf away? Try putting some warm milk on your thumb and forcing it into the calf's mouth. Keep doing that over and over again to be sure the calf actually tastes the milk.Try goats milk from a bottle, or tubing it with colostrum. You may have to try to "teach" the calf to suck by confining the cow to a head gate, hobbling her (if she keeps kicking him off) and getting the calf to suckle on the teat by squirting some milk in its mouth to get a taste of its momma's milk. If that doesn't work after a few attempts, you will have to try to bottle feed it, tube it, or even try goats milk (unpasteurized) instead.
The most obvious answer is that the calf will die if you don't do something about it immediately. The most immediate answer is that the calf will go hungry and eventually lose its ability to retain the antibodies and immunoglobins if not fed colostrum right away. This will eventually and potentially may be the final nail in the calf's coffin.
Most, if not all cows don't make any sound at all when giving milk. They just stand quietly munching away at hay as they are being milked, or just stand quietly as their calf suckles away.
No. She will continuously produce colostrum for the calf even after the calf is born. But separate her from the rest of the herd so the calf does have a chance to suckle his momma and not get pushed away by a milk thief. Better yet, see if you can catch the milk thief suckling on that preg cow. If it's another calf, separate that calf with his momma in another pen. If it's another cow, put the cow through a catch chute, put a temporary spiked nose ring in her nose, and let her back with the herd. That nose ring should stop her from suckling milk from another cow.
A cow needs to be milked at least twice every day. When she has her calf with her, the calf will take milk from her several times a day and so the cow always feels 'comfortable'. When the calf has been taken away so that we can have her milk instead, her udder fills with milk and needs to be emptied at least twice (preferably three times) a day or she will become extremely uncomfortable and before too long, very ill.
Milk is made from the cow ranches in the inland, mostly not very far away from the Murie-Darling River.
There are many ways that you can get the calf interested in the bottle, you can dip the nipple into the milk before inserting it into the calf's mouth or try to put a little bit of molasses on the tip, this will give the nipple a sweet taste and get the calf suckling again. Back the calf into a corner, with its head towards the middle of the pen so that it cannot back away. Make sure that the milk is not too hot but not too cold (test the temperature on the back of your wrist as you would for human babies). Hold the bottle on a 45 degree angle so that the calf does not ingest air. Some calves are picky about the size of the opening in the nipple, brand new nipples usually have too small of an opening, widen it so that the calf is not working too hard to get the milk out but not so much that the calf is drowning. Try offering the bottle to the calf every couple of hours to get it used to it.